Extension functions for Start Activity

StartActivityExt.kt

import android.app.Activity
import android.content.Intent

fun Activity.startActivity(
    cls: Class<*>,
    finishCallingActivity: Boolean = true,
    block: (Intent.() -> Unit)? = null
) {
    val intent = Intent(this, cls)
    block?.invoke(intent)
    startActivity(intent)
    if (finishCallingActivity) finish()
}